200538845 玖、發明說明： 【發明所屬之技術領域】 本發明係相關於一種投影機之外掛式鏡頭遮罩，尤其係相關於一種置 於才又影機鏡頭外側配合各種不同格式的投影晝面作搭配設計以降低畫面外 雜散光外洩的鏡頭遮罩。 【先前技術】 一般的投影機在光由光機投射後經過多次的反射和投射後會產生雜散 光，而這些雜散光由鏡頭溢出後，會降低對比度，如此對於應用於如家庭 劇場的影片的播放，其暗場晝質的質感會有影響。 因而，一般的投影機為降低畫面暗場，以提高對比表現，通常會在光_ 機系統内增加光欄的設計。惟在光機系統内增加光糊的設計，不但要對光 機整體增加元件或改變設計，增加製造費用，更何況對現存投影機的機種 亦於事無補。故在不變更現有投影機内部構造且不增加製造成本之下，增 設光栅裝置實有實質上的需要。 【發明内容】 本發明之一目的係提供一種投影機之外掛式鏡頭遮罩，可置於投影鏡 頭的外側，配合各種不同的格式的投影畫面設計成固定式光柵或可調式光 栅。 本發明的另一目的係提供一種投影機之外掛式鏡頭遮罩，可在不更動 光機設計的狀況下，由外部提升畫面的品質，減少製造成本。 本發明之又一目的係提供一種投影機之外掛式鏡頭遮罩，可以避免畫 面外區域因雜散光而產生的不良光影，可改善視覺享受的品質。 為達上述目的’本發明投影機之外掛式鏡頭遮罩可包含一片體和^^ 固件，片逋穿設有一四方形孔，片體係和卡固件結合一齊以卡固於一投影 機。本發明投影機之外掛式鏡頭遮罩又可包含：一基板，其中間處開設有 一四方形孔；上、下調整板，置於該機板之後方，且在上調整板的下端的 中間處和下調整板的上端的中間處相對應的設置有二開放的四方形槽；以 及調整裝置，以數結合元件結合於基板以及上下調整板以在基板上調整該 上、下調整板的相對位置。 200538845 本發明之這些目的和其它目的、特點和優點藉由以下說明配合圖式對 熟悉該項技藝人士將更清晰明瞭。 【實施方式】 有關本發明為達到上述目的，所採用之技術手段及其餘功效， 茲舉三較佳實施例，並配合圖式加以說明如下： 請參閱第1圖。第1圖係顯示依據本發明之一實施例之固定式光拇之 鏡頭遮罩的透視圖。一固定式光柵之鏡頭遮罩10主要係為一由不透光材質、 所製成或在表面塗敷以不透光材料的平板所形成的圓盤狀的片體10卜以用 一 來遮斷由一投影機的鏡頭所投射出來的雜散光，其直徑大小約等於投影機 的鏡頭前的外框的内直控（如第2A和2B所示之鏡頭之外框之内直徑）；在 該片體101上可開設一四方形的孔102，該孔1〇2之形狀與位置係依鏡頭之鲁 類型而設，一般的投影畫面的格式為16:9，所以四方形孔1〇2的長寬比率 可作成16:9,但為適應不同的格式比，其長寬比亦可作成4:3或甚至2.35: 1，本實施例係將孔102偏離該片體ιοί的圓心處設置。片體1〇1周緣設有 數挾持耳103，此等挾持耳103可與片體1〇1 —體成形或以黏固或焊接的方 式結合於片體101 ;挾持耳103的數量和位置並無特別限定，只要使用者方 便將鏡頭遮罩10裝卸於投影機的鏡頭外框即可。又，圓形片鱧丨⑽的外圓 周上可黏固如纖維材質的材料以作為卡固件，可讓卡固件後牢於鏡頭的外 框中。 要將上面所述之固定式光栅之鏡頭遮罩安裝於投影機的動作可參閱第 2A和2B圖。使用者只要以手指夾住片體1〇1上的挾持耳1〇3對準一投影機 1的鏡頭2外的外框3嵌上。在鏡頭遮罩1〇欲裝於外框3之後，以手指挾 持住鏡頭遮罩10轉動片體101直至四方形孔對準成像圈（投影畫面的區域） 即可。 其次，請參閱第3和4圖。第3和4圖係顯示依據本發明之另一實施 例之可調整式光柵之鏡頭遮罩的零件爆炸圖和組裝後的剖面圖。一可調整 式光柵之鏡頭遮罩20包含一基板201和上、下調整板202和203。基板201 之上下左右四個角落處各設有一個套管2011，而基板201上則開設一四方 形開口 204，該孔204之形狀與位置係依鏡頭之類型而設，本實施例中孔 200538845 204係一對稱基板寬度方向之中心線（即第3圖中A—A，線），且依照一般 投影機投影晝面的位置的設計，此開口 204的中心點又位於基板長度方向 (即第3圖中之B-B’線）的中心線之上方。又，上調整板2〇2的下緣和下 調整板203的上緣的中心處各設有一開放的四方形槽2〇22和2〇32，且該兩 開放的四方孔2022和2032的大小相同且上下對應。又，上、下調整板202 和203分別在四方形槽2022和2032的左右兩侧又各設一套管2〇21和 2031。這些分列在基板201和上、下調整板2〇2和203的左右侧的套管2011、 2021和2031的中心孔大小皆相同，於組裝後，其内之中心孔的中心線左右 各對齊成一直線，且該兩直線成平行（如第4圖所示）。又，上調整板202 的右側套管2021和下調整板203的左侧套管2031以及上調整板2〇2的左 側套管2021和下調整板203的右側套管2031之中，只有一對其中心呈有 螺紋且可有延伸至外部的螺紋部2〇23和2033，以加強上、下基板被&桿 205帶動的穩定性。為了說明方便起見，在第三和四圖係採用前者，亦即只 有上調整板202的右側套管2021和下調整板203的左側套管2031的中心 孔具有螺紋。而，基板201上的套管的中心孔全不具螺紋。 請參閱第4圖，當上面所述之基板201和上/下調整板2〇2和2〇3组 裝成一鏡頭遮罩時，將上、下調整板202和203置於基板201之上下套管 2011之間。接著’再將第三圖所示的兩螺桿2〇5分別插人基板2〇ι和上、 下基板兩側成直列的套管2011、2021、2023和2011 ;當螺桿穿出最下端的 套管2011時，再以固定塾片207套在螺桿205的端部2052，以避免組件脫 落。要因應不同格式的投影畫面時，只要旋轉螺桿2〇5上的旋紐觀，即 可牽動與螺桿205喊合的上調整板202上的左套管2021或/和下調整板 2031上的右套管2031而帶動上或/和下調整板2〇2、2〇3上下移動而改變 開放的四方槽的2022和2032所形成的封閉四方形大小。一般而士，所調 整出來的封閉四方形長寬比例可為-般投影畫面的格式比，例如4S3、㈣ 或 2.35:1 等。 · · 請參閱第5圖。第5圖係顯示依照本發明的鏡頭遮罩套用在投影機的 示意圓。當本實施·鏡頭遮罩20要套入-投影機i時，將位於某板2〇1 上的卡固片206卡固於投影機鏡頭2處的投影機上下緣，再按照^面所述 200538845 之步驟調整封閉四方形長寬比例而符合投影畫面的格式比。 請參閱第6和7圖。第6和7圖係顯示依據本發明之又一實施例之可 調整式光柵之鏡頭遮罩的零件爆炸圖和組裝後的剖面圖。一可調整式光拇 之鏡頭遮罩30包含一基板301和上、下調整板302和303。基板301上於 左右上下四端皆設有一套管3011，這四個套管的中心孔皆不設螺紋。基板 301上尚開有一四方形孔304，其裝設的位置同於上一實施例所述的四方形 孔204，在此不再贅述。又，基板301上在四方形孔304橫向中央線上靠近 ’ 基板侧邊處設有兩導槽307。上調整板302的下端緣和下調整板303的上端 緣各開設有上下對應且大小相同的開放的四方形槽3022和3032;開放的四 方形槽3022和3032的寬度大約同於基板上四方形槽的寬度。又，在上、 下調整板302和303上開放的四方形槽的兩侧各設有一槓桿板結合座3〇8，# 每個結合座308上皆設有一結合孔3081，上、下調整板3〇2和303之左右 側設有套管3021、和3031，同側之套管其中心孔大小皆相同，且其中一同 側之套管之中心孔設有螺紋，本實施例係將左側之套管之中心孔設有螺紋。 當要組合本實施例的鏡頭遮罩30，請參閱第7圖。首先，將顯示在第 6圖中的槓桿板309的扣接桿3091扣接到對應的槓桿板上的扣接孔3092並 使扣接桿3091之一端容置於導槽307内，再將各槓桿板309上的另一扣接 桿扣接到上、下調整板302和303上的每個結合座308的結合孔3081 ;結 合後的每個結合點包括槓桿板309間的結合點和槓桿板309和結合座308 間的結合點皆為樞接。爾後，將組合後的整組上、下調整板3〇2和3〇3和I 槓桿板309至於基板301的上下兩套管3011之間。在基板30和上、下調 整板302和303上的左右側的套管3011、3021、3031和3011的中心孔對 齊後’將第6圖的上下具有反向螺紋的螺桿305和直桿3〇6插入左右兩側 的套管列’當螺桿305和直桿306穿出最下端的套管3011時，再以固定墊 片310套在螺桿305和直桿306的端部，以避免組件脫落。因為螺桿305 上下的螺紋反向與中心孔同樣具有反向螺紋的上、下調整板3〇2和303的 左側套管3021和3031嚙合後，因此可同步帶動上、下調整板302和303 閉合或分開以調整開放的四方形槽3022和3032所形成的封閉的開口大小 以配合投影晝面的大小，同時透過槓桿板3〇9與導槽3〇7之配合及直桿3〇6 200538845 與右侧套管配合’作為導引’故可使上、下調整板3〇2和303平穩地上下 移動。 又，左側套管的中心孔的螺紋可延伸至套管的外部，同樣可增加上、 下調整板被帶動的穩定性，情形如上一實施例所述。 又，本實施例的鏡頭遮罩亦同樣可具有如上述實施例的卡固件以方便 鏡頭遮罩裝卸於投影機。此情形亦與上述實施例同，故將有關圖式和說明 省略。 惟以上所述者’僅為本發明之一較佳實施例而已，並非用來限定本發 明實施之耙圍。故即凡依本發明申請專利範圍所述之形狀、構造、特徵及 精神所為之均等變化與修飾，均應包括於本發明之申請專利範圍内。 200538845 【圖式簡單說明】 第1圖係顯示依據本個之—實施例之固定式光柵之鏡輔罩的透視圖。 第2A和2B圖係顯不將固定式光柵之鏡頭遮罩安裝於投影機的動作示意圖。 第3圖係顯不依據本發明之另一實施例之可調整式光糖之鏡頭遮罩的零件 爆炸圖。 第4圖係顯示依據本發明之另一實施例之可調整式光柵之鏡頭遮罩組裝後 的剖面圖。 第5圖係顯示將另依實施例的可調整式光柵之鏡頭遮罩安裝於投影機的動 作示意圖。 第6圖係顯示依據本發明之又一實施例之可調整式光柵之鏡頭遮罩的零件 爆炸圖。 第7圖係顯示依據本發明之又一實施例之可調整式光柵之鏡頭遮罩的組裝 後的剖面圖。 【元件編號】 1 投影機 10 遮罩 101 片體 102 孔 103 挾持耳 2 鏡頭 20 遮罩 201 基板 2011、2021、2031 套管 202 上調整板 2022、2023 槽 203 下調整板 2031、2032 套管 204 開口 205 端部 200538845 2051 旋扭 206 卡固片 3 外框 30 遮罩 301 基版 3011 套管 302、303 調整板 3021、3031 套管 3022、3032 槽 304 孔 307 導槽 308 結合座 3081 結合孔 309 槓桿板 307 導槽 306 直桿200538845 发明 Description of the invention: [Technical field to which the invention belongs] The present invention relates to a plug-in lens cover for a projector, and particularly relates to a projection daylight surface that is placed outside the lens of the projector and cooperates with various different formats. A lens hood designed to reduce stray light outside the screen. [Previous technology] General projectors produce stray light after multiple reflections and projections after the light is projected by the light machine. After the stray light overflows from the lens, it will reduce the contrast. This is useful for films such as home theaters. Playback, its dark field day quality texture will have an impact. Therefore, in order to reduce the dark field of the picture in order to improve the contrast performance, a general projector usually adds a light bar design in the optical system. However, the addition of a light paste design in the optical-mechanical system not only adds components or changes to the design of the optical-mechanical system, which increases manufacturing costs, but also does not help the existing projector models. Therefore, without changing the internal structure of the existing projector and increasing the manufacturing cost, there is a substantial need to add a grating device. [Summary of the Invention] An object of the present invention is to provide a plug-in lens hood for a projector, which can be placed outside the projection lens, and is designed as a fixed grating or an adjustable grating with projection pictures of various formats. Another object of the present invention is to provide a plug-in lens hood for a projector, which can improve the picture quality externally and reduce the manufacturing cost without changing the design of the light machine. Still another object of the present invention is to provide a plug-in lens hood for a projector, which can avoid bad light and shadow caused by stray light in the area outside the screen, and can improve the quality of visual enjoyment. In order to achieve the above-mentioned objective, the plug-in lens hood of the projector of the present invention may include a piece of body and a piece of firmware. The piece of film is provided with a square hole, and the piece system and the fastener are combined to be fixed to a projector. The plug-in lens hood of the projector of the present invention may further include: a base plate having a square hole in the middle thereof; upper and lower adjustment plates placed behind the machine plate and in the middle of the lower end of the upper adjustment plate; Two open square grooves are provided correspondingly at the middle of the upper end of the lower and upper adjustment plates; and an adjusting device is coupled to the substrate with a number of coupling elements and the upper and lower adjustment plates to adjust the relative of the upper and lower adjustment plates on the substrate. position. 200538845 These and other objects, features, and advantages of the present invention will become clearer to those skilled in the art through the following description and drawings. [Embodiment] Regarding the technical means and other effects adopted by the present invention to achieve the above-mentioned object, three preferred embodiments are given below, which are described in conjunction with the drawings as follows: Please refer to FIG. 1. FIG. 1 is a perspective view showing a lens cover of a fixed thumb according to an embodiment of the present invention. The lens hood 10 of a fixed grating is mainly a disc-shaped sheet body 10 made of an opaque material, or a flat plate coated with an opaque material on the surface. The diameter of the stray light projected from the lens of a projector is approximately equal to the inner direct control of the outer frame in front of the lens of the projector (such as the inner diameter of the outer frame of the lens shown in 2A and 2B); A square hole 102 can be opened on the film body 101. The shape and position of the hole 102 is determined by the type of the lens. The format of the general projection picture is 16: 9, so the square hole 10 The aspect ratio can be made 16: 9, but in order to adapt to different format ratios, the aspect ratio can also be made 4: 3 or even 2.35: 1. In this embodiment, the hole 102 is set away from the center of the circle. . There are several holding ears 103 on the periphery of the sheet body 101. These holding ears 103 can be integrally formed with the sheet body 101 or bonded to the sheet body 101 by cementing or welding; the number and position of the holding ears 103 are not It is particularly limited as long as the user conveniently attaches and detaches the lens shield 10 to the lens frame of the projector. In addition, a material such as a fiber material can be fixed on the outer periphery of the circular plate 鳢 丨 ⑽ as a card holder, so that the card holder can be firmly fixed to the outer frame of the lens. Refer to Figures 2A and 2B for the action of mounting the lens hood of the fixed grating as described above on the projector. The user only needs to grip the holding ears 103 on the sheet body 101 with his fingers and align it with the outer frame 3 outside the lens 2 of a projector 1. After the lens hood 10 is to be mounted on the outer frame 3, hold the lens hood 10 with fingers 转动 and rotate the sheet body 101 until the square hole is aligned with the imaging circle (the area of the projection screen). Second, see Figures 3 and 4. Figures 3 and 4 are exploded views and cross-section views after assembly of a lens hood of an adjustable grating according to another embodiment of the present invention. The lens hood 20 of an adjustable grating includes a substrate 201 and upper and lower adjustment plates 202 and 203. A sleeve 2011 is provided at each of the upper, lower, left, right, and left corners of the substrate 201, and a rectangular opening 204 is provided on the substrate 201. The shape and position of the hole 204 are set according to the type of the lens. The hole 200538845 in this embodiment 204 is a center line in the width direction of the symmetrical substrate (ie, line A-A in FIG. 3), and according to the design of the position of the daytime plane projected by a general projector, the center point of the opening 204 is located in the length direction of the substrate (that is, the first Above the center line of the line BB 'in 3). In addition, an open square groove 2022 and 2032 are provided at the center of the lower edge of the upper adjustment plate 202 and the upper edge of the lower adjustment plate 203, and the sizes of the two open square holes 2022 and 2032 are respectively. The same and corresponding up and down. In addition, the upper and lower adjustment plates 202 and 203 are respectively provided with a set of tubes 2021 and 2031 on the left and right sides of the square grooves 2022 and 2032, respectively. The center holes of the sleeves 2011, 2021 and 2031, which are arranged on the left and right sides of the base plate 201 and the upper and lower adjustment plates 202 and 203, are all the same. After assembly, the center lines of the center holes in the sleeves are aligned left and right. Straight line, and the two straight lines are parallel (as shown in Figure 4). Among the right sleeve 2021 of the upper adjustment plate 202 and the left sleeve 2031 of the lower adjustment plate 203, and the left sleeve 2021 of the upper adjustment plate 202 and the right sleeve 2031 of the lower adjustment plate 203, only one pair The center is threaded and may have threaded portions 2023 and 2033 extending to the outside to enhance the stability of the upper and lower substrates driven by the & bar 205. For convenience of explanation, the third and fourth figures are the former, that is, only the center holes of the right sleeve 2021 of the upper adjustment plate 202 and the left sleeve 2031 of the lower adjustment plate 203 are threaded. However, the central hole of the sleeve on the substrate 201 is not threaded. Please refer to FIG. 4. When the above-mentioned base plate 201 and the upper / lower adjustment plates 2202 and 203 are assembled into a lens cover, the upper and lower adjustment plates 202 and 203 are placed on the base plate 201 and the lower cover. Between 2011. Then, 'the two screws 205 shown in the third figure are inserted into the sleeves 2011, 2021, 2023, and 2011 in parallel on both sides of the substrate 20 and the upper and lower substrates; when the screws pass through the lowermost sleeve At the time of the tube 2011, a fixed cymbal 207 is set over the end 2052 of the screw 205 to prevent the component from falling off. To cope with projection screens of different formats, as long as the knob view on the screw 205 is rotated, the left sleeve 2021 on the upper adjustment plate 202 and / or the right on the lower adjustment plate 2031 can be dragged with the screw 205. The sleeve 2031 drives the upper or / and lower adjustment plate 202, 203 to move up and down to change the size of the closed square formed by the open square grooves 2022 and 2032. Generally speaking, the adjusted aspect ratio of the closed square can be the format ratio of a normal projection picture, such as 4S3, ㈣, or 2.35: 1. · · Refer to Figure 5. Figure 5 shows a schematic circle of a lens hood applied to a projector according to the present invention. In this implementation, when the lens cover 20 is to be inserted into the projector i, the fixing piece 206 located on a certain board 201 is fixed to the upper and lower edges of the projector at the lens 2 of the projector, and then as described in ^ The steps of 200538845 adjust the aspect ratio of the closed square to match the format ratio of the projected picture. See Figures 6 and 7. Figures 6 and 7 are exploded views and sectional views of the lens hood of an adjustable grating according to another embodiment of the present invention. An adjustable lens cover 30 includes a base plate 301 and upper and lower adjustment plates 302 and 303. A set of tubes 3011 are provided on the base plate 301 at the left, right, upper and lower ends, and the central holes of these four sleeves are not provided with threads. A rectangular hole 304 is still formed in the base plate 301, and its installation position is the same as the rectangular hole 204 described in the previous embodiment, which will not be repeated here. In addition, two guide grooves 307 are provided on the substrate 301 on the lateral center line of the square hole 304 near the substrate side. The lower end edge of the upper adjustment plate 302 and the upper end edge of the lower adjustment plate 303 are respectively provided with open square grooves 3022 and 3032 corresponding to the same size, and the open square grooves 3022 and 3032 are approximately the same width as the square on the substrate. The width of the slot. In addition, on both sides of the open square grooves on the upper and lower adjustment plates 302 and 303, a lever plate combination seat 3008 is provided on each side. # Each combination seat 308 is provided with a coupling hole 3081, and the upper and lower adjustment plates are provided. There are sleeves 3021 and 3031 on the left and right sides of 3202 and 303. The size of the center hole of the sleeve on the same side is the same, and the center hole of the sleeve on the same side is provided with threads. In this embodiment, the left side The central hole of the sleeve is provided with a thread. When the lens hood 30 of this embodiment is to be combined, please refer to FIG. 7. First, the fastening rod 3091 of the lever plate 309 shown in FIG. 6 is fastened to the corresponding fastening hole 3092 of the lever plate, and one end of the fastening rod 3091 is accommodated in the guide groove 307. Another buckle rod on the lever plate 309 is fastened to the coupling hole 3081 of each of the coupling seats 308 on the upper and lower adjustment plates 302 and 303; each combined point after the combination includes the joint point between the lever plate 309 and the lever The joints between the plate 309 and the joint seat 308 are all pivoted. Thereafter, the entire set of upper and lower adjustment plates 302 and 303 and the I lever plate 309 are placed between the upper and lower sleeves 3011 of the base plate 301. After aligning the center holes of the sleeves 3011, 3021, 3031, and 3011 on the left and right sides of the base plate 30 and the upper and lower adjustment plates 302 and 303, 'the upper and lower screws 305 and straight rods with reverse threads of FIG. 6 are aligned. 6 Insert the casing rows on the left and right sides. When the screw 305 and the straight rod 306 pass through the lowermost casing 3011, the end of the screw 305 and the straight rod 306 is sleeved with a fixing washer 310 to prevent the component from falling off. Because the upper and lower threads of the screw 305 are reversely aligned with the left and right sleeves 3021 and 3031 of the upper and lower adjustment plates 3202 and 303 that also have reverse threads in the center hole, the upper and lower adjustment plates 302 and 303 can be simultaneously closed. Or separate to adjust the size of the closed opening formed by the open square grooves 3022 and 3032 to match the size of the projected daylight surface. At the same time, through the cooperation of the lever plate 3009 and the guide groove 3007 and the straight rod 3006 200538845 and The right sleeve can be used as a guide so that the upper and lower adjustment plates 3202 and 303 can move smoothly up and down. In addition, the thread of the center hole of the left sleeve can extend to the outside of the sleeve, which can also increase the stability of the upper and lower adjustment plates being driven. The situation is as described in the previous embodiment. In addition, the lens hood of this embodiment can also have the same fasteners as the above embodiment to facilitate the lens hood to be attached to and detached from the projector. This situation is also the same as the above-mentioned embodiment, so the relevant drawings and explanations are omitted. However, the above-mentioned one is only a preferred embodiment of the present invention, and is not used to limit the implementation of the present invention. Therefore, all changes and modifications of the shape, structure, characteristics and spirit described in the scope of the patent application of the present invention shall be included in the scope of the patent application of the present invention. 200538845 [Brief description of the drawings] Fig. 1 is a perspective view showing a mirror auxiliary cover of a fixed grating according to this embodiment. Figures 2A and 2B are schematic diagrams showing the operation of mounting the lens hood of the fixed grating to the projector. FIG. 3 is an exploded view of a lens cover of an adjustable light sugar according to another embodiment of the present invention. FIG. 4 is a cross-sectional view showing an assembled lens shield of an adjustable grating according to another embodiment of the present invention. Fig. 5 is a schematic diagram showing the operation of mounting a lens shield of an adjustable grating according to another embodiment to a projector. FIG. 6 is an exploded view of a lens mask of an adjustable grating according to another embodiment of the present invention. Fig. 7 is a sectional view showing an assembled lens shield of an adjustable grating according to another embodiment of the present invention. [Component number] 1 projector 10 mask 101 sheet 102 hole 103 holding ear 2 lens 20 mask 201 substrate 2011, 2021, 2031 sleeve 202 upper adjustment plate 2022, 2023 slot 203 lower adjustment plate 2031, 2032 sleeve 204 Opening 205 End 200538845 2051 Twist 206 Clamping piece 3 Outer frame 30 Mask 301 Base plate 3011 Sleeve 302, 303 Adjusting plate 3021, 3031 Sleeve 3022, 3032 Slot 304 hole 307 Guide slot 308 Combination seat 3081 Combination hole 309 Lever plate 307 Guide slot 306 Straight rod